Starrett Combination Square Insert - Manual

Steel Rule
Spirit Level
Lock Bolt
Protractor Head
Lock Bolt
Lock Bolt
Square Head
Direct Reading Scale
Spirit Level (Reverse Side)
Scriber
Center Head
Laroy S. Starrett
(1836-1922)
Congratulations on your purchase of a Starrett
Combinaton Square. Starrett was the first and is still the
best combination square available.
Invented by our Laroy S. Starrett, in 1877, the
combination square was literally the driving force in the
founding of The L.S. Starrett Company in 1880.
After more than 130 years, this practical and versatile tool
is still commonly utilized in a wide variety of applications.
Description and Components
The combination square includes a hardened steel
graduated rule and movable combination square and miter head with spirit level
and scriber. The square head has a precision ground 90° square face and a 45°
miter face. It is a highly versatile layout tool for scribing right angles and parallel
lines, and a measuring tool that can be used as a tri-square, miter, depth gage,
height gage, and level.
The Center Head is an available attachment that provides an easy means of
accurately locating the center of cylindrical or square work.
The Protractor Head is another available attachment. It has revolving turrets with
direct-reading double graduations, a full 0 to 180° in opposite directions. This
permits accurate and quick direct reading of angles above or below the blade.
Complete Sets are available including the rule and all three heads in a fitted case.
Applications: Combination Square Center Head
Applications: Combination Square Protractor Head
Tips for Using Squares and Center Heads
• Ensure that the square is clean and located against a flat surface – irregularities
such as burrs on metal or knots on wood adversely effect accuracy.
• While the steel scriber can be used on any material, it is most commonly used for
metal. A carpenter's pencil is normally used on wood, but a light cut with a utility
knife will produce a finer line, and is also useful for cross grain scribing.
• When using a center head on a piece that may not be completely round, scribe more
than two intersecting lines to achieve the best possible accuracy.
starrett.com • 978-249-3551 Form 955 20M/S 01/10 Specifications subject to change.
Introduction, Assembly & Applications
The Starrett Combination Square